Migrates tests from PHPUnit to Pest (#4)

Replaces PHPUnit with Pest for testing.

This change enhances test writing experience, improves
readability, and simplifies test structure by adopting
Pest's expressive syntax.

Updates CI workflow and composer dependencies to reflect
the migration to Pest.

Author: Ahed92Wakim

.github/workflows/ci.yml

@@ -7,8 +7,8 @@ on:
     branches: [ develop, main ]
 
 jobs:
-  phpunit:
-    name: PHPUnit
+  pest:
+    name: Pest
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -35,8 +35,8 @@ jobs:
       - name: Install dependencies
         run: composer install --no-progress --prefer-dist --no-interaction
 
-      - name: Run PHPUnit
-        run: composer test
+      - name: Run Pest
+        run: ./vendor/bin/pest --ci
 
   php-cs-fixer:
     name: PHP CS Fixer

composer.json

@@ -36,12 +36,18 @@
     ],
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.88",
-        "phpunit/phpunit": "^11.5"
+        "phpunit/phpunit": "^11.5",
+        "pestphp/pest": "^3.8"
     },
     "scripts": {
         "fix": "php-cs-fixer fix --config=.php-cs-fixer.php",
         "fix:dry": "php-cs-fixer fix --config=.php-cs-fixer.php --dry-run --diff",
         "fix:ci": "php-cs-fixer fix --config=.php-cs-fixer.php --using-cache=no --dry-run",
         "test": "vendor/bin/phpunit --configuration phpunit.xml --colors=always"
+    },
+    "config": {
+        "allow-plugins": {
+            "pestphp/pest-plugin": true
+        }
     }
 }